Precalculus Examples

$- \tan (x) \cos (x)$

Step 1

Add parentheses.

$- (\tan (x) \cos (x))$

Step 2

Rewrite $- \tan (x) \cos (x)$ in terms of sines and cosines.

$- (\frac{\sin (x)}{\cos (x)} \cos (x))$

Step 3

Cancel the common factors.

$- \sin (x)$